If I were you, I wouldn't let anyone near that crystal vase.
The sentence shifted from active voice to passive voice.
hope this helps.
If there were more job opportunities, people could afford to go shopping.
I'm pretty sure I've answered this correctly if I haven't tell me what the question is meaning and ill try again. Can in present, could is future tense.
The corrected sentence is:
"After you complete the application, you must turn the forms to the office."
When there is an inappropriate shift of verb voice or mood, it means that the verb voice shifted from active to passive or from passive to active. Such shift can confuse the reader. So, when correcting the inappropriate verb voice, it's preferable to use the active voice. Also, whenever the subject of a sentence performs the action, it is known to be in the active voice. While if the subject receives the action, the sentence is in the passive voice.
The revised version of the sentence would be as follows: When we searched the school for damage, we discovered a broken window.
In most English sentences with an action verb, the subject performs the action denoted by the verb. As the subject does or acts upon the verb, the sentences are said to be in the active voice. However, one can change the canonical word order of a sentence so that subject is no longer active, but being acted upon by the verb, as the original version of the sentence above shows.
In the sentence above, the construction with the passive voice is a broken window was created. As you can see, the direct object has been moved to the subject slot and an auxiliary form of the verb to be has been introduced. For the sentence to be active again, you should introduce the doer of the action, the one that discovers the broken window (we). That is why the revision contains the personal pronoun in question.